Nonmetals usually exist as molecules, combining with atoms of themselves.
Nonmetals can exist on their own as individual atoms.
Metallic elements can exist on their own as individual atoms.
Explanation:
Non-metals usually exists as molecules in which their atoms combines with one another.
Non-metals are capable of covalently bonding with themselves by sharing their electrons and establishing an atomic bond. Metals cannot do this because they prefer to lose their electrons due to the large density of electrons in them. For example O₂, N₂ e.t.c
Non-metals can exist on their own as individual atoms. A stable atom with an octet configuration is generally stable and can exist on its own. A group of non-metals in group 8 can exist on their own. For example Neon gas is an atom of neon, Argon e.t.c
Metallic elements can also exists as individual atoms on their own. They have large sizes and prefers to lose electrons. Gold, Copper, Sodium are some of the metallic elements freely occur as stable individual atoms.
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Metals and non-metals brainly.com/question/2758034
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Answer:
d.all of the above
Explanation:
The physical feature of the planet Earth affect people's activities in the following manner -
- Choice of Occupation - the process of occupation is completely a land depended process , hence any changes on the physical features of Earth , like the climate , temperature , rain etc , will hinder the occupations process .
- Method of transportation - it is also a Climate dependent process , so any change in climate may obstruct the transportation facility .
- Recreational activities - also depends on the physical feature of the planet Earth .
Answer:
Explanation:
When a projectile is fired upwards with some initial speed then the it reaches the top of the projectile and then falls back to the ground.
According to the question we need to find the work done by the gravity which is acting downwards for the projectile when it is at a position just about to hit the ground in course of falling down.
As we know that work is given as:
here:
force of gravity on the object (which is acting downwards)
displacement of the object
- Here the work done by the gravity at an instant just before the projectile hits the earth will be negative as the displacement is in the direction opposite to the force of gravity.
Newtons first law states that if an objects velocity is changing a <u>force</u> must be acting on it.
Explanation:
Newton's first law of motion states that:
"An object at rest (or in uniform motion) will remain at rest (or will continue moving with the same velocity) unless acted upon an unbalanced force"
We can apply this law to a daily life example:
- Take a book at rest on a table: the forces acting on the book are balanced. If we do not apply any other force, we know that the book will remain at rest: this is exactly what is summarized in Newton's first law.
- Take a space probe moving in the interstellar space, very far from any planet or source of gravitational force. Since there are no forces acting on the proble, the probe will continue moving at the same velocity (same speed and same direction) forever, unless stopped by a new force acting on it.
This means that in order to put an object at rest in motion, or to stop an object already in motion, or to change its velocity, an unbalanced force needs to be applied: otherwise, the object will continue having the same velocity (which can be either zero or non-zero), so it will continue having same speed and same direction.
Learn more about Newton laws of motion:
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Answer:
H = 5 m
Explanation:
As the person leaves the slide horizontally so the time taken by the person to hit the water is given as
so we can find the vertical velocity by which person will hit the water using kinematics
now the speed of the person at the end of the slide is given as
now by energy conservation we can find the initial height
